How can I check if a number is in exponential notation? [closed]

Question

How can I check if number is exponential? I have a case in my code when adding or multiply integers, when usual number gets converted to exponential.

A rough example - 10000000*100000000000000000 will return 1e+24.

Answer 1

Convert to a string and check for e.

let num = 10000000;
console.log(num.toString().includes('e'));

num *= 100000000000000000;
console.log(num.toString().includes('e'));